Poly[(5,6-dihydro-5-octyl-4,6-dioxo-4H-thieno[3,4-c]pyrrole-1,3-diyl)[4,8-bis[5-(2-ethylhexyl)-2-thienyl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]]

Benzodithiophene, BDT, Thienopyrrole, Heterocyclic five-membered ring, Organic semiconducting materials, Low band gap polymers, Organic photovoltaics, Polymer solar cells, OFETs, Photodetectors.

PBDTTTPD, poly[(5,6-dihydro-5-octyl-4,6-dioxo-4H-thieno[3,4-c]pyrrole-1,3-diyl)[4,?8-bis[5-(2-ethylhexyl)-2-thienyl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl], has been used in the application of all polymer solar cells with PBDTTTPD as polymer donor and P(NDI2HD-T) polymer acceptor providing high power-conversion efficiency of 6.64%.   PBDTTTPD shows complementary absorption with poly-naphthalene-diimides as acceptor polymers and the low-lying HOMO energy level of PBDTTTPD produces a high VOC value in all-PSCs.  Polymer-polymer solar cell with PBDTT-TPD as donor and P(NDI2OD-T2F) as acceptor has a VOC = 1.00 V, JSC = 11.68 mA cm−2 and FF = 0.52 to give a PCE 0f 6.09%.

PBDTTTPD, poly[(5,?6-?dihydro-?5-?octyl-?4,?6-?dioxo-?4H-?thieno[3,?4-?c]?pyrrole-?1,?3-?diyl)?[4,?8-?bis[5-?(2-?ethylhexyl)?-?2-?thienyl]?benzo[1,?2-?b:4,?5-?b']?dithiophene-?2,?6-?diyl]?, has been used in the application of all polymer solar cells with?PBDTTTPD as polymer donor and PNDI(2HD)T polymer acceptor providing high power-conversion efficiency of 6.64% .